func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) {

        if let tabVC = self.window?.rootViewController as? UITabBarController {
            if shortcutItem.type == "Hausaufgaben" {

            tabVC.selectedIndex = 1
            tabVC.performSegue(withIdentifier: "gotoHausaufgaben", sender: nil)

            }
        }
    }